Lock mechanism for doors



April 15, 1941. w FALK 2,238,314

' LOCK MECHANISM FOR DOORS Filed May 12, 1939 2 Sheets-Sheet 1 INVENTOR. W/L L QM FHL K A BY (L TTODNEY April 15, 1941- w. FALK 2,238,314

LOCK MECHANISH FOR IDQORS Filed May 12, 1939 n 5. 2g /5 /9 /41 /6/7 35 Z7 2 Sheets-Sheet 2 .-IIIIIH i INVENTOR. [5 l/l//L L /AM Fia/ /C TTORNEY Patented Apr. 15, 1941 l UNITED STATES PATENT( OFFICE t LooKMEontslF'oi/rnoonsf t I I Independent Lock Company, Fitchburg, Mass.,4 a corporation of Massachusetts Application May 12, 1939Serial No.' 273,187 f 8 Claims. (ICl. 292-4337) The present invention relates to locks of the parts throughout `the several views, I repretype generally used for doors of homes, apart- 4sents the doorjamb which is bored' to provide a ments, offices and the like, which are Operated recesstherein intowhich is fitted a cup-shape by rotation of a knob or handle on both sides of keeper vIl having a laterally extending' Wing at the door, its outer end'forming a striker I2. The keeper 'I'he principal object of the present invention 'its Secured Within the dOOliemb by means Of is to provide a door look of improved oonsfru ,a suitable stud I3 and is adapted to receive there',- tion and dosign which may be oonvonientiy in 1n the head of the latchbolt to be referred to stalled and which is adapted to be securely and herelnafter- I rigidly retained Within the door against possible The door '4 1 Wnlon 1s adapted-for houslng the displacement. Another object of the invention lock mechanlsrn'f 1s proVlded Wlth 'a 'reeess is to provide a door look of the character de formed thereln by hole I5 which is bored through scribed, which is economical to manufacture and the face of the door andanole I6 eornrnuneateicient in use. A further object of the invenmg Wrth the hole 5 Wnen is' bored through'the tion is to provide .in a door lock of the type hereedge of the door- T ne door rook comprises I a inabove mentioned improved mechanism for the casing Il which 1s positioned in the recess-fof the purpose of locking the knobs or handles against door and extends through the bore '5 into the rotation in order to prevent `movement of the bore ,5- Tne easlng I7 1S prOVded With all latch. A still further object of the invention is Opemrtg 'at the" Outer end through' Which the to provide locking mechanism for the aforesaid 2o latch 1S adapted to preJeet and Wtn a remover'- purpose which is designed to be automatically ble Oever Fortron 's adjacent the nnerfend t0 thrown out of looking position when the door is permit access to the vmechanism contained therebeing shut, thus insuring against accidental or m The OU-ter end of the easing' "is Preferably unintentional lockin'g of the door. Other obalso provrded Wltn an annular nenge I9 WhCh S jects and advantages of the present invention adaptedto bear against "ashoulder fOrmed et will in part be pointed out hereinafter and will the Outer end of the 'bore I6 the face of Said in part be apparent to those skilled in the art to ange '9 lying nush 'With thek edge Of the door.

which the present invention relates. Mounted on the easing H Within the bOI'el5y is With the above and other objects in view the a Spacer Washer 2n and threaded on'tne easing invention consists of the novel features of cons a Spanner nut 2t 4Which, hetusV egallstA the struction, combination of elements and opera- Washer '20 in a-rnanner t0 Securely 'alldfl'igdly tive arrangements of parts hereinafter described retain .the easing Within the IeCeSS 0f the door. and Shown in the accompanying drawings The Spanner nut is preferably illustrate a preferred embodiment ofthe vinven- .grooves 22 in the periphery thereof tO permitadmon, justmentwith a suitable tool.. ,The casing I1 is In the accompanying drawings which form an thus'held securelyragainet movement and .may he integral pari; of this specification easilyand convenientlyrernoved from .the door Fig. 1 is a transverse sectional view, through when deslred r f fthe door and lock constructed in accordance with 'on .the lnner Slde -01 the door there is provided the present invention taken on line I-I of #le a Cove-r plate r3 and on tne outer side of thefdOOI Fig 2; thereis provided another cover kplate 24. The

Fig. 2 is a vertical longitudinal sectional view plates 23- and 24 are provided Primarily t0 COVel' through the door and lock taken on line 2-2 of the .bore I5 and are preferably secured on oppo- .Figa l; site sides of the door by means of .bolts which Fig.` 3 is a transverse sectional View taken on 45 ,extend through apertures formed .in the .inner the une 3 3 of Fig 2; cover plates 23, and throughfsuitablebushings Fig.' 4 is a vertical longitudinal sectional View 26 provided in the Casing n: the threaded ends 0f taken on the-lino 4 4 of Fig 3; the bolts 25 entering into bosses 21 formed onthe Fig. 5 is a vertical transverse sectional View inner Surface of tneouter ooVer plate 24- V'EX- taken on the line 5-5 of Fig. 4; and 50 Vtending also through apertures formed in the Fig. 6 is a side elevational View of the door A eoVer plates 23- and 24 and through the Casing jamb looking on the face of the striker, taken Il, from the inside t0 the Outsideff the donis on the line 6--6 of Fig. 2. a square shaped spindle 28 to the ends of which Referring now to the drawings wherein like are secured knobs or handles 29in a mannerto reference vcharacters indicate corresponding rotatetherewith.v This arrangement and con struction facilitates the assembling of the various parts of the lock in proper alignment and permits disassembling only from the inner side of the door. The knobs are also thus insured against binding with the inner cover plates.

Within the casing I1 there is slidably mounted a latch bolt 30 having a beveled head 3| at its outer end and an open yoke 32 at its inner end. The ends of the yoke 32 are provided with ears 33 the purpose of which will be described hereinafter. Mounted on the latch bolt 30 is a compression spring 34 one end of which is adapted to bear against the head of the bolt 3' and the other end adapted to bear against a shoulder 35 formed within the casing, in a manner to normally urge the latch bolt 30 into locking position. Mounted on the spindle 28, within the casing, is a cam 36 which is keyed or spllned to the spindle in a manner to rotate therewith. Thus, upon rotating the spindle 28 by means of one of the knobs or handles 23, the cam 36 is actuated so as to engage the ears 33 of the yoke 32, thereby drawing the latch bolt 30 against the action of the compression spring 34 into unlocked position. Releasing the knob or handle 29 causes the latch bolt to return to locking position due to the action of the compression spring 34.

For the purpose of locking the knobs or handles of the door against rotation so as to keep the latch in locked position, I provide a lock arm 31 positioned within the recess of the door between the cover plates and secured at one end to a rotatable shaft 33 which extends through an aperture in the inner cover plate 23. The lock arm 31 is provided with a groove 39 which is adapted to receive therein the spindle 28, and with a lug 40 which extends through an arcuate slot 4| in the cover portion of the casing I8 and is adapted to bear against one of the ears 33 of thel yoke 32, when the lock arm 31 is placed in locking position. A compression spring 42 is positioned within a recess 43 formed in the lock arm 31, which normally urges a ball bearing 44 against the inner side of the cover plate 23. l

A recess formed on the inner side of the cover plate 23 is adapted to receive the ball bearing 44 when the lock arm 31 is placed in locking position. A rotating lever 45 is secured to the end of' the shaft 38 on the inner side of the door, F

which operates to throw the lock arm 31 into and out of locking engagement with the spindle 28.

It will be observed that the construction and design of my invention facilitates installation for it eliminates the attendant diiculties of mortising the. door, as required for present installations, and obviates the use of the usual studs for the purpose of securing the lock within the door. Furthermore, my improved construction provides for more secure retention of the lock against displacement for the Spanner nut 2l provides more effective retaining means and is less likely to. become dislodged and may be easily adjusted when required.

It will be observed also that when the door is in closed position and the lever 45 is moved in the direction for throwing the lock arrn 31 into locking engagement with the spindle, the knobs on both sides of the' door are held against rotation, thus preventing movement of the latch bolt l and opening of the door. The door may thereafter be opened only after disengaging the lock arm from the spindle by means of the lever 45. In'the'event that the door is in open position and the lock arm 31 accidentally or unintentionally is thrown into locking engagement with the spindle 28, then, upon shutting of the door the pressure of the striker l2 against the bolt head 3| would move the latch bolt 33 inwardly within the casing l1. Thereupon the ear 33 of the yoke 32 would bear against the lug 40 of the lock arm 31 and the lock arm would thus be urged out of locking engagement with the spindle 28. There is thus no danger of being locked out after leaving the inner room and shutting the door from the outside, as is often the case with the locking mechanism presently in common usage. Other advantages may become obvious with use.

While I have described the construction of my improved look mechanism in detail, I am aware that the invention may be embodied in other specific forms, and I desire it to be understood that I do not intend to limit myself to the specific embodiment herein described and illustrated, but to include any obvious changes which would come within the scope of my invention as defined inV the appended claims.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent, is-

1. In combination with a door having a recess therein formed by intercommunicating bores through the face and edge of the door, of a unitary latch casing assembly extending through the edge bore into the face bore and having a shoulder at the outer end abutting the edge of the door, and retainingmeans mounted on the casing adjustable in relation to said casing and bore and adapted to be drawn into engagement with the wall of the face bore, whereby the casing is anchored within the door.

2. In combination with a door having a recess therein formed by intercommunicating bores through the face and edge of the door, of a latch casing extending through the edge bore into the face bore and having a shoulder at the outer end abutting the edge of the door, and a retaining nut threaded on the casing adjustable in relation to said casing and bore and adapted to be drawn into engagement with the wall of the face bore, whereby the casing is anchored Within the door.

3. In combination with a door having a recess therein formed by intercommunicating bores through the faces and edge of the door, of a latch casing extending through the edge bore into the face bore and having a shoulder abutting the edge of the door, an adjustable nut threaded on the casing within the face bore, and a spacer member interposed between the nut and the wall of the face bore, whereby the casing is anchored within the door.

4. In a door lock, a latch casing having a shoulder at the outer end, a portion of the body of said casing which is arranged to be within the door being threaded and a retaining nut threaded on said portion, whereby the casing may be drawn into engagement with a portion of the wall of the door orice which is arranged to receive the casing.

5. In combination with a door having a recess therein formed by intercommunicating bores through the face and edge of the door, of a latch casing extending through the edge bore into the face bore and having a shoulder at the outer end abutting the edge of the door, a retaining nut threaded on the casing and adapted to be drawn against the wall of the face bore for anchoring the casing, cover plates :for the face bore on opposite Sides of the door, and bolts extending through the inside cover plate and latch casing and threaded into the inner face of the outside cover plate.

6. In combination with a door having a recess therein formed by intercommunicating bores through the face and edge of the door, of a latch casing extending through the edge bore into the face bore and having a shoulder at the outer end abutting the edge of the door, a retaining y nut threaded on the casing, a spacer member der at the outer end and a body portion thereof being formed to be Within the door body, a portionvof said casing adjacent the inner end including adjustable means adapted to engage said casing and to be drawn against the Walls of the orice arranged to receive said casing.

8. In a door lock, a latch casing assembly having a shoulder at the outer end and a body portion which is arranged to be disposed on the inner part of the door, a retaining nut adjustably threaded on the body of said casing and a spacer member interposed between the shoulder and said retaining nut, whereby the casing may be drawn into a door orifice which is arranged to receive the casing by the action of said nut against said spacer member.

WM. FALK.

. CERTFIGATE OF CORRECTION'. Percentile. 2,258,5lli. April l5, 19141.

wlLLlAM FALK. l lt is hereby certified that error appears in the above numberedpatent requiring eerreetien ee fellows; ln theneeding to the printed specificetion, line 6, for "Applicationlay l2, 1959, Serial 110.275,18?"- read --Substituted for abandoned application Serial No.,190,2OT, February l2, 1958. This `application May l2, 1959, Serial No. 275,l87; page l, first column, line l, before the Words "The present invention" insert the following paragraph- This application is a substitutev for abandoned application Serial No. 190,207, filed February l2, 1958.;

and that the said Letters Patent should beread with this correction therein that the same may conform to the record ofthe case in the Patent Office.

p Signed and sealed this 20th day of May, A. D. 19141.

l Henry Van Ar`sda1e, (Seal) i Acting Commissioner of Patents. 

